works great - been working 24/7 for the past 3 weeks without any issues. very quiet. good purchase and would recommend.

Update 7/13/2021: i ordered another one as my pump all the sudden stopped spinning again. i remembered to try cleaning it again like back in 2020 and this thing is working like a champ again. Love this pump. Keeping the new order as a back up for when cleaning no longer works.

Ive been using this pump since july 2019 , about 10 months now. It seemed to stop working may 11th 2020 as the fan stopped spinning when it was plugged in. Fortunatley I was able to remedy it by removing the fan and cleaning out the magnet housing inside which looked to be caked up with built up film, using a tooth brush. It is a little tricky to unlock the fan from its housing, you will need a flat screw driver something to lightly hammer the screw driver and something to wedge inbetween the screw driver and the point that locks in the fan.

In addition, i messaged vivosun and they graciously offered me a solution to either refund or replace the product at no cost to me. I have to say that was very nice of them on their part. Fortunately I didnt have to take them up on their offer so kudos to them for customer service.

The pump i purchased was the 4500gph version which they do not have listed anymore but i would venture to say that the higher and lower units are both probably good and worth the try and value. The 4500gph is really strong, i did no testing to show the output is actually 4500gph since well I dont know how. But, i can say it flips my 1700gallon fish pond over rather well causing enough flow that my pond stays clear. The flow was so much that i had to add two diy overflow 2" pipes to a 1 1/2 and 2" pipe outlets for the return. This thing easilly shoots up water 4' off the ground.

The intake fans seem to be designed in away that algae/debrie does not clog up on it or at least i havent had that issue as of yet. However the cover to the fans can get clogged if its not ventilated well for flow or if the debri is too big and cakes up around the entire inlet casing.

As i mentioned earlier, the fan can stop if film from debrie and water minerals forms a film on the inside of the motor and the fan magnet itself. in the inside of the magnet housing the fan rests in.

My only consistent complaint i have about this pump as another customer has mentioned is the inlet cover that protects the fan. It is loose and can come off if not secured in some way. It does not lock well in its current design. I use pvc piping to connect to the outlet on the cover and secure rhe cover from coming off by usinf large stones inside a bucket that holds the fan in place. The pvc piping basically gets hold by the stones which inturn keeps the cover from moving. Im sure one can find other clever ways to keep it on. This pump can take either hosing or pvc piping, which us great because i prefer pvc over hoses for this thing. Also the pvc connectors can easilly be found at home depot. There are a few options to connect it, i used a threaded coupler with smooth end to attach pvc. I forgot what size but it shouldnt be too hard to figure it out.

I would recommend anyone to try vivosuns models of this type of pump. The cost and effeciency is worth it.

I do not believe my pump stopping due to the film build up was a defective reason and more of a wear and tear cause so well see as i continue to use the one i currently have.

I have bought a few versions of these pumps and they all work great until a peice of plastic breaks and it's all down hill.

This one was clearly a return. It doesn't look like it was run long or only in very clean water but it has dirt and was very roughly put back in the box. That's why the 3 star review, otherwise it would be 4.

This pump does work great for high output water features. I don't love the hose hookup/adapter it comes with, it's not all that easy to get a hose on and we have had to double up clamps and even that sometimes doesn't work.

We run these virtually 24-7 and they do last as expected for the price point.

This pump is working fine so far after a couple weeks. I use it for a small stream and waterfall that flows into a small pond in my backyard. The flow rate isn't quite as high as I had expected from the description but that's probably my misunderstanding rather than any problem with the pump, but it makes a nice babbling brook.

The quality of the product is superb.  The pump is quiet and has the lift power I need.  Its design is well thought out, with a selection of outlet positions and ease of maintenance and cleaning.  Most of all, it cost less than one-half of my previous pump.